Challenges
Every challenge is attached to a kernel, and the leaderboard is the outcome.
1 OPEN$0 IN OPEN BOUNTIES0 SUBMISSIONS0 EXECUTIONS0 CLOSING THIS WEEK
FEATUREDBUILDKERNEL · encrypted-moduloSPONSORED BY FAIRMATH
Compute a mod b with both operands encrypted
Submit an implementation computing `a mod b` over encrypted operands. The winning solution is featured in the FHERMA Cookbook, with the author credited as a co-author.
BOUNTYno bounty
CLOSES IN24 d
SUBMISSIONS0
STANDINGS
No execution has run yet. Standings appear once the measurement layer exists — every submission re-run on the same runner, so the ranking means something.
33 SHOWN · SORTED BY CLOSING DATE
BUILDDRAFT
Recommend without seeing the history
KERNELencrypted-recommendationL4
BOUNTYno bounty
DRAFTDec 2026
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDDRAFT
Prepare features without decrypting them
KERNELencrypted-feature-engineeringL4
BOUNTYno bounty
DRAFTNov 2026
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDJUDGING
Decompose an encrypted 170×256 image
KERNELencrypted-svdL3
BOUNTYno bounty
JUDGINGJan 2026
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Evaluate softmax on a CKKS ciphertext
KERNELencrypted-softmaxL3
BOUNTY$2,000
CLOSEDNov 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Evaluate GELU on a CKKS ciphertext
KERNELencrypted-geluL3
BOUNTY$2,000
CLOSEDAug 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Classify the sentiment of encrypted tweets
KERNELencrypted-text-classificationL4
BOUNTY$3,000
CLOSEDJul 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Find a private pattern in a large text
KERNELencrypted-substring-searchL3
BOUNTY$4,000
CLOSEDMay 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Predict house prices over encrypted features
KERNELencrypted-regressionL4
BOUNTY$3,000
CLOSEDApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Decide membership without revealing the element
KERNELencrypted-set-membershipL3
BOUNTY$4,000
CLOSEDApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Retrieve the 10 nearest neighbours of an encrypted query
KERNELencrypted-knnL3
BOUNTY$4,000
CLOSEDApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDDRAFT
Evaluate SMOD over encrypted operands
KERNELencrypted-smodL2
BOUNTYto be announced
DRAFTApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDDRAFT
Evaluate SDIV over encrypted operands
KERNELencrypted-sdivL2
BOUNTYto be announced
DRAFTApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDDRAFT
Evaluate MULMOD over encrypted operands
KERNELencrypted-mulmodL2
BOUNTYto be announced
DRAFTApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDDRAFT
Evaluate ADDMOD over encrypted operands
KERNELencrypted-addmodL2
BOUNTYto be announced
DRAFTApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDDRAFT
Evaluate SIGNEXTEND over encrypted operands
KERNELencrypted-signextendL2
BOUNTYto be announced
DRAFTApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDDRAFT
Evaluate ISZERO over encrypted operands
KERNELencrypted-iszeroL2
BOUNTYto be announced
DRAFTApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDDRAFT
Evaluate BYTE over encrypted operands
KERNELencrypted-byteL2
BOUNTYto be announced
DRAFTApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDDRAFT
Evaluate XOR over encrypted operands
KERNELencrypted-xorL2
BOUNTYto be announced
DRAFTApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDDRAFT
Evaluate SHR over encrypted operands
KERNELencrypted-shrL2
BOUNTYto be announced
DRAFTApr 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Classify encrypted Ethereum transactions
KERNELencrypted-fraud-detectionL4
BOUNTY$4,000
CLOSEDMar 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Invert an encrypted 64×64 matrix
KERNELencrypted-matrix-inversionL3
BOUNTY$3,000
CLOSEDMar 2025
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Sort an encrypted array under CKKS
KERNELencrypted-sortingL3
BOUNTY$5,000
CLOSEDOct 2024
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Evaluate SHL over encrypted operands
KERNELencrypted-shlL2
BOUNTY$2,500
CLOSEDAug 2024
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Find the maximum of an encrypted vector
KERNELencrypted-maxL3
BOUNTY$3,000
CLOSEDAug 2024
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Retrieve the i-th element of an encrypted array
KERNELencrypted-lookupL3
BOUNTY$5,000
CLOSEDAug 2024
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Classify encrypted CIFAR-10 images
KERNELencrypted-image-classificationL4
BOUNTY$10,000
CLOSEDJun 2024
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Evaluate parity(x) under CKKS
KERNELencrypted-parityL3
BOUNTY$5,000
CLOSEDJun 2024
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Evaluate ReLU on a CKKS ciphertext
KERNELencrypted-reluL3
BOUNTY$5,000
CLOSEDJun 2024
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Tally an encrypted vote
KERNELencrypted-tallyL4
BOUNTY$2,000
CLOSEDMay 2024
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Evaluate the logistic function on a CKKS ciphertext
KERNELencrypted-sigmoidL3
BOUNTY$5,000
CLOSEDFeb 2024
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Multiply two encrypted 64×64 matrices
KERNELencrypted-matrix-multiplicationL3
BOUNTY$3,000
CLOSEDJan 2024
0 submissions
runners tbdFairMath
runners tbdFairMath
BUILDCOMPLETED
Evaluate sign(x) on a CKKS ciphertext
KERNELencrypted-signL3
BOUNTY$3,000
CLOSEDJan 2024
0 submissions
runners tbdFairMath
runners tbdFairMath